Put item on DynamoDB table using AWS SDK for Node.js

I'm new to javascript and node.js and was wondering if someone can help me figure out the syntax of putting a new item onto an existing table on AWS Dynamodb through their node.js SDK. Here's what I have so far. Is there an example for what I'm trying to do? If anyone could point me in the right direction, it'd be much appreciated.

var AWS = require('aws-sdk');
AWS.config.loadFromPath('./config.json');
AWS.config.update({region: 'us-east-1'});
var dynamodb = new AWS.DynamoDB();

var item = {
    // I need to put the an item with a the primary key of "id", and an attribute called "item"
    // I'm new to js and node.js, so if somebody could help me understand the documentation
    // http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/frames.html#!http%3A//docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB_20120810.html
}

dynamodb.putItem({TableName: 'log_dev', Item: item}, function(err, data){
    if (err) {
    console.log(err); // an error occurred
    } else {
    console.log(data); // successful response
    }
});